to North Korea to check on the leader's health.
At the same time, an official familiar with U.S. intelligence also said they had not reason to conclude Kim was seriously ill, despite the North Korean leader being known to have health problems.
Kim's whereabouts was last reported on April 11, when he presided over a state meeting.
Since then, he missed the birthday of his grandfather, Kim Il Sung, on April 15.
This is not the time the 36-year-old has disappeared from public view.
In 2014, Kim went missing for more than a month, only to reappear on state TV walking with a limp.
These images lead to further reports of the leader's poor health, such as his apparent heavy smoking and pointing out the weight he had gained since taking office.
Meanwhile, a retired US army general said this week that he thought the White House knows more about Kim's health than its admitting.
Jack Keane, who previously served as Vice Chief of Staff of the US Army, said he thought the North Korean leader was still alive, but that figures within the regime were trying to conceal something "fundamentally wrong" with him.
Jack Keane, who previously served as Vice Chief of Staff of the US Army, said he thought the North Korean leader was still alive but the regime is trying to conceal something wrong Credit: Fox News In 2014, Kim went missing for more than a month, only to reappear on state TV Credit: AFP - Getty